Plug in lighting system



FIG. 1 is a front elevational view of a plug in lighting system showing my new design, with the cover portion shown partially removed;

FIG. 2 is a rear elevational view thereof, with the cover portion in place;

FIG. 3 is a right side elevational view of FIG. 2;

FIG. 4 is a left side elevational view of FIG. 2;

FIG. 5 is a top plan view of FIG. 2; and,

FIG. 6 is a bottom plan view of FIG. 2.

The wires are shown broken away to indicate indeterminate length. 

The ornamental design for a plug in lighting system, as shown and described. 